The adult moths are on the wing between December and early January and are attracted to sugar traps and to light.

This species was first described by Edward Meyrick in 1929 using a male specimen collected by George Hudson at Waiouru in December.

Forewings rather short-triangular, broader than in micrastra, termen rather obliquely rounded, crenulate; dull reddish-brown; veins (except towards costa) mixed dark fuscous and slightly sprinkled white; first and second lines indicated by obscure grey-whitish dots on veins; orbicular and claviform indicated by faint greyish suffusion; distinct white dots on each side of lower end of transverse vein; three or four indistinct whitish dots on costa posteriorly; terminal edge blackish, with minute white dots on veins: cilia light red-brownish, tips grey-whitish.

Hindwings rather dark grey; cilia ochreous-whitish, suffused light ochreous towards base.

Hoare hypothesised that this may be because these populations are a remnant of a formerly more widely distributed group but also may result from this species being overlooked.

[2] The adults of this species are on the wing between December and early January and are attracted to sugar traps and to light.